[css-ruby] Use our own terminology, rather than JLREQ's

Author: frivoal

css-ruby-1/Overview.bs

@@ -1127,7 +1127,7 @@ Sharing Annotation Space: the 'ruby-merge' property</h3>
 				The user agent may use any algorithm to determine how each ruby annotation box
 				is rendered to its corresponding base box,
 				with the intention that if all annotations fit over their respective bases,
-				the result is identical to “mono ruby”,
+				the result is identical to ''separate'',
 				but if some annotations are wider than their bases
 				the space is shared in some way
 				to avoid imposing space between bases.